Time usually passes quickly when you are （）your work.
A、absorbed in
B、involved in
C、concerned with
D、indifferent to
【正确答案】：A
【题目解析】：本题考查动词短语辨析。be absorbed in：全神贯注于…；be involved in：牵涉进…；be concerned with：关心，关注；be indifferent to：对…漠不关心。句意：当你全神贯注于工作时，时间会过得很快。故A选项最符合题意。
